For the cities of our God - This rather indicates that the relief of Medeba was one of the immediate objects in view, and consequently that at this time Medeba was still in the possession of the Reubenites. To prevent an Israelite city falling into the hands of a pagan people, and the rites of Moloch being substituted for the worship of Yahweh, was a very urgent motive to valor.
Related Commentaries of 2 Samuel 10:12
2 Samuel 10:12
12 Be of good courage, and let us play the men for our people, and for the cities of our God: and the LORD do that which seemeth him good.